Mann, Malcolm IELTS for academic purposes : 6 practice tests 5.5 to 6.5 / Malcolm Mann & Steve Taylore-Knowles - New York : McGraw-Hill Education, 2009 - 144 p. + 1 Audio CD E-B7/05890 (original) ISBN: 0071269576 9780071269575 Subjects--Index Terms: IELTS Tiếng Anh Dewey Class. No.: 428.0076